Silo-hoop-spring device.



A. STRICKERT.

SlLO HOOP SPRING DEVICE. APPLICA'HON FILED JULY I, 1915.

WITNESSES I v INVENTOR v BY I I I ATTORNEY TIIE COLUMBIA PLANOORAPH cu., WASHINGTON. D. c.

ALBERT srnrcxnn'r, or? ,1L Y1 I DE N,-;WASHINGTQN; Assrcnon crown-HALF TO J'omfw. mnxmrnrox, or LYNDEN, WASHINGTON.

main ooslssnsaibetas" Specification of Letters Patent.

Patented Apr. 11, 1916.

Application filed July 1, 1915. Serial No. 37,415.

To all whom it may concern:

Be it known that I, ALBERT Srnroxnnr, a citizen of the United States, and a resldent of Lynden, in the county of Whatcom and State of Washington, have invented. certaln new and useful Improvements in Silo-Hoop- Spring Devices, of which the followlng 1s a specification.

My invention relates to improvements 1n silo-hoop-spring devices and the ob ects of my invention are to provide elastlc means which will operate to retain the hoops 1n operative tenseness on the silo and yet permit of the usual shrinking and swelllng of the silo staves due to changing conditlons of moisture of the same and also, means to permit the easy removal of the hoop springs without loosing the hoops of WlllCh they form a part.

The device by which I accompllsh these objects is illustrated in the accompanying sheet of drawings in which- Figure 1 isv a plan view ofmy sllo-hoopspring device in operative position on a 8110, only a part of which is shown, and Flgs. 2 and 3 are end-elevation views of parts shown in Fig. 1.

Similar characters refer to similar parts in the several views. Certain parts are broken into in order the better to show other parts hidden thereby.

A portion of the $110 body 1s represented by l, a long metal plate 2 has the edges of its end portions bent over to form the sl deway guides 2 Figs. 1 and 3. In the slldeways thus formed are engaged the head blocks 3, 3 each of which has a broadened bottom with beveled edges 3*, 3 to fit and operate in said slideways in sliding rclatlon. Each of head blocks 3 has the hole P, F 1g. 3, large enough to easily accommodate the bolt 4, and it also has a tapped hole in lts smaller end into which is screwed the screw hook 6.

Head blocks 3, 3 are placed in slideways 2 2 as shown in Fig. 1 with screw hooks 6, 6 juxtaposed. With these hooks are engaged the loops on the ends of spr ng 7. Safety bolt 4 has threaded ends and is put through hole 4;, 4: in head blocks 3, 3, and

nuts 4", 4 are screwed on said threaded ends outside of said blocks 3. In each of tapped holes 5 5 blocks 3, 3, are screwed the threaded stud bolts 5, 5., Hoop lugs 8, 8 having holes 5 Fig. 2, areplaced over the outer ends of stud bolts 5, 5 and secured by nuts as shown. Then the threaded ends of hoop 9 are placed in holes 9*, 9*, Fig. 2, in hoop lugs 8, 8, and

nuts screwed thereon for tightening saidhoop until spring 7 is under tension. Under each of hoop lugs 8 is placed a piece of sheet iron 10 to prevent said hoop lugsv 8 from chafing the silo staves as they move back and forth under the action of spring 7. If desired, these chafing plates can be attached either to the silo or to the said hoop lugs. But because of the constant spring pressure, it is usually sufiicient to place them unattached beneath said hoop lugs.

When coupled up as shown in Fig. 1, the spring '7, if of proper strength, will hold hoop 9 under suflicient tension to properly retain the staves of the silo and yet permit of the usual swelling and shrinking thereof. The nuts 4", 4 are placed in a position to permit of the necessary extension of spring 7 but do not allow said spring to be drawn Fig. 3 in the larger ends of head beyond its elastic limit. When head blocks t 3, 3 reach and bear against said nuts, spring 7 cannot be further extended and bolt 4 takes its place as a part of the hoop. -When it is desired to take out spring 7, nuts 4 4 are advanced on bolt 4 to render this easily possible. Then when the hoop strain comes on said bolt the head blocks 3, 3 are prevented from tilting toward each other by guides 2 2*.

Having thus explained my invention what I claim as new and desire to ters Patent is,

1. In a silo-hoop-spring device of the character described the combination of a spring, head blocks attached to the ends of said spring, said head blocks engaged as slides in slideways, and slideways for said head blocks, with the ends of a hoop connected to said head blocks.

2. In a silo-hoop-spring device of the character described the combination of a secure by Lethead blocks attached t0the ends of VVhatcom and State of Washington this 21st day of June A. D. 1915.

ALBERT STRIOKERT.

spring, said spring, said head blocks engaged as slides in slideways, slideways for said head blocks, and the ends of a hoop engaged with said head blocks, with a safety bolt through said head blocks.

Signed at Bellingham in the county of Witnesses:

R. S. SIMPSON, JOHN L. THOMAS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

